Hi, I've started noticing that my iMac freezes after I have left it on over the night. When I turn my iMac on the clock is displaying some time on the evening when I last used the computer. What is weird though is that when I go into the Console app and check the logs I can see that the backup daemon has been running successfully during the night. Out of the vanilla iMac I had installed 4GB extra of ram, which I have removed now and still the same freezes occur. Also I have Installed an SSD (Intel 320 Series 160GB) instead of the standard disk drive. I'm hoping I don't have to open up my iMac again to replace it with the standard disk. I've tried resetting SMC and PRAM to no avail. What to do?